Mary Leary , professor, law, was quoted in a National Catholic Register story on cases of excessive force. See below.
From: National Catholic Register Date: Dec. 23, 2014 Author: Peter Jesserer Smith
... The grand jury is a check on prosecutors and police and an inquisitorial tool in cases involving possible felony crimes, according to Mary Leary, a criminal-law professor at The Catholic University of America and a former prosecutor of state and federal cases for 10 years.
"You [as a prosecutor] can only ask for indictment on charges you think you can prove," she said.
While the job of a trial jury is to determine whether "reasonable doubt" is involved, as to the guilt of the accused officer, the grand jury's job is to determine "probable cause" that the evidence shows a crime may have happened and the defendant committed it.
"The grand jury is a citizen voice saying the case should go forward," Leary said. ...
Read more about Leary's expertise.